'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});
exports.default = promiseMiddleware;

var _isPromise = _interopRequireDefault(require('is-promise'));

var _fluxStandardAction = require('flux-standard-action');

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : { default: obj };
}

function _objectSpread(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {};
    var ownKeys = Object.keys(source);
    if (typeof Object.getOwnPropertySymbols === 'function') {
      ownKeys = ownKeys.concat(
        Object.getOwnPropertySymbols(source).filter(function(sym) {
          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
        })
      );
    }
    ownKeys.forEach(function(key) {
      _defineProperty(target, key, source[key]);
    });
  }
  return target;
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true
    });
  } else {
    obj[key] = value;
  }
  return obj;
}

function promiseMiddleware(_ref) {
  var dispatch = _ref.dispatch;
  return function(next) {
    return function(action) {
      if (!(0, _fluxStandardAction.isFSA)(action)) {
        return (0, _isPromise.default)(action)
          ? action.then(dispatch)
          : next(action);
      }

      return (0, _isPromise.default)(action.payload)
        ? action.payload
            .then(function(result) {
              return dispatch(
                _objectSpread({}, action, {
                  payload: result
                })
              );
            })
            .catch(function(error) {
              dispatch(
                _objectSpread({}, action, {
                  payload: error,
                  error: true
                })
              );
              return Promise.reject(error);
            })
        : next(action);
    };
  };
}
